NOTE Upadhyay et al Genetic diversity of Epinephelus awooia determined by RAPD analysis 



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tively for Na. Ne. and H) of genetic 

 diversity; this loss may be due to 

 high fishing pressure of the grouper 

 population in Guangdong. 



Conclusion 



These results indicate that commer- 

 cial fishing may result not only in 

 selective genetic changes in exploited 

 stocks but also in reduced genetic 

 diversity due to genetic drift. The 

 loss of genetic diversity may be par- 

 ticularly pronounced during the 

 initial stages of exploitation, and 

 investigations into the advanced 

 stages of exploitation may be less 

 likely to detect significant changes 

 in allelic diversity. This loss can 

 also be tested for other commer- 

 cially exploited species of grouper in 

 genetic and demographic context. In 

 the present study, the RAPD method proved useful and 

 technically convenient for the study of genetic diversity 

 of yellow grouper [Epinephelus awoara): therefore, it can 



Loci 



Figure 1 



Probabilities (P>0.05) that show the significance of homogeneity of gene 

 frequencies across populations of yellow grouper [Epinephelus awoara I. Arrows 

 show the range of probability. 



also be applied to other species of grouper and enable 

 the analysis of many samples in a short time. The pres- 

 ent work also indicates that molecular markers used 



